The S.C. Department of Corrections said early Monday morning that an incident involving “multiple inmate on inmate altercations” in three housing units at the prison began around 7:15 p.m. The prison was secure at 2:55 a.m.

Another tweet said all responding officers are safe and accounted for.

According to The State, the facility houses around 1,600 inmates and is located about 55 miles from Columbia.